package chapter;
class Student2 {
    public Student2 () {
        System.out.println("调用了无参1构造方法");
    }
}
public class Example05 {
    public static  void main(String[] args){
        System.out.println("声明对象...");
        Student stu = null;// 声明对象
        System.out.println("实例化对象...");
        stu = new Student();// 实例化对象
    }
}
